Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig delivers a precision-machined 80% platform for builders who demand control over their AR-15 project. This complete kit includes the RL556V3 lower receiver and the patented Rhino universal jig system, allowing you to finish your lower at home with standard tools. Constructed from impact-modified polymer, the receiver resists flex under recoil while maintaining compatibility with mil-spec parts. Whether you are starting a new build or adding to your inventory, the polymer80 rl556v3 – rhino 80% ar15 lower receiver with jig provides a reliable foundation without the need for serialization by a licensed manufacturer.

Features & Specs

Every element of this kit is built for consistent performance and ease of use. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig includes everything required to complete the lower, minus the finishing bits. The jig system is fully adjustable and reusable, reducing setup time for multiple builds. Below are the key specifications and design features.

• Manufacturer: Polymer80; Category: Parts; material: reinforced polymer with internal steel trigger pin inserts
• Compatible with all mil-spec AR15 upper receivers, lower parts kits, and buffer tube assemblies
• Rhino jig includes hardened steel drill bushings, alignment blocks, and step-by-step engraved markings

The lower receiver is designed with an integrated trigger guard and flared magazine well for faster reloads. The polymer80 rl556v3 – rhino 80% ar15 lower receiver with jig weighs approximately 8 ounces, keeping your overall build weight low without sacrificing durability. All critical dimensions are pre-machined to within 0.005 inch tolerance, so you can trust the fit when assembling your rifle.

Who It’s For

This kit is intended for individuals who are legally allowed to possess firearms and wish to complete a non-serialized lower receiver for personal use. It suits both first-time builders and experienced gunsmiths who prefer a straightforward, repeatable finishing process. The polymer80 rl556v3 – rhino 80% ar15 lower receiver with jig is ideal for those who value modularity, since the lower can be built as a pistol or rifle configuration depending on your state and local laws. If you want a cost-effective way to create multiple identical lowers without visiting a machine shop, this kit eliminates the guesswork. Note that you must be 21 years or older to purchase this product, and it is not for resale to any party that intends to manufacture firearms for commercial distribution.

Shipping & FFL

This product ships directly to your residential or business address within the United States. No Federal Firearms License (FFL) transfer is required because the lower receiver is classified as an 80% unfinished component. You are responsible for ensuring compliance with all federal, state, and local laws regarding the possession and finishing of unserialized firearm parts. Some states and municipalities restrict or prohibit the purchase of 80% receivers; please verify your jurisdiction before ordering. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig will be shipped via a common carrier with adult signature required. We reserve the right to cancel any order if we determine the shipment would violate applicable laws. By purchasing this item, you confirm that you are legally eligible to own a firearm and that you will use the product only for lawful purposes.